Best Browser Privacy Extensions You Should Install Today

Your web browser knows more about you than most people in your life. Every website you visit, every search you make, every product you look at — it’s all tracked, recorded, and often sold to advertisers and data brokers. The default settings on most browsers prioritize convenience over privacy, leaving you exposed to an invisible web of surveillance.

The good news is that a handful of well-chosen browser extensions can dramatically improve your privacy without sacrificing your browsing experience. This guide covers the best privacy extensions available today, explains what each one does, and helps you build a privacy setup that works for your needs.

The short answer: install uBlock Origin and Cookie AutoDelete, and you’ve handled most of it. But the browser you’re using now changes that answer more than it used to — Google’s Manifest V3 rollout means the full uBlock Origin no longer runs in Chrome, so Chrome users are working with a weaker tool than Firefox and Brave users are. The per-browser breakdown below covers what actually works where.

Why Browser Privacy Extensions Matter

Every time you visit a website, dozens of invisible trackers follow your activity. These trackers are embedded in ads, social media buttons, analytics scripts, and even seemingly harmless page elements. They build detailed profiles of your interests, habits, shopping behavior, and browsing patterns — then share that data across a vast network of advertisers and data brokers.

A single visit to a typical news website can trigger connections to 50 or more third-party trackers. Over time, these trackers piece together a remarkably detailed picture of who you are, what you care about, and what you’re likely to buy. This data collection happens silently in the background, and most people have no idea it’s occurring.

Browser privacy extensions work by intercepting these tracking attempts before they can collect your data. They block tracking scripts from loading, prevent cookies from following you across sites, and encrypt your connections to keep your browsing habits private. Combined with smart browsing practices and good personal data protection habits, these extensions form a powerful defense against online surveillance.

Essential Privacy Extensions for Every Browser

uBlock Origin — The Foundation of Browser Privacy

If you install only one privacy extension, make it uBlock Origin. This lightweight, open-source ad and tracker blocker is widely considered the gold standard for browser privacy. Unlike many ad blockers that let “acceptable ads” through in exchange for payment from advertisers, uBlock Origin blocks everything by default with no compromises.

uBlock Origin works by referencing regularly updated filter lists that identify known trackers, ads, and malicious scripts. It blocks these elements from loading in the first place, which not only protects your privacy but also makes web pages load significantly faster and use less bandwidth.

Key features:

• Blocks ads, trackers, and malicious scripts
• Significantly reduces page load times
• Uses minimal CPU and memory compared to alternatives
• Supports custom filter lists for advanced users
• Completely free and open-source with no hidden agenda

The Chrome problem. uBlock Origin was built on Manifest V2, the extension platform that let it inspect and block network requests in real time. Google replaced it with Manifest V3, which swaps that capability for a more limited API and caps how many filter rules an extension can hold. Chrome finished disabling Manifest V2 extensions, and the classic uBlock Origin went with them.

What Chrome offers instead is uBlock Origin Lite, written by the same developer to fit inside Manifest V3’s constraints. It is a real blocker and it is better than nothing, but it is not the same product: it can’t do the dynamic, per-request filtering the original was known for, and its rule budget is fixed by Chrome rather than by the filter lists. Treat it as a downgrade you accept in exchange for staying in Chrome.

The full uBlock Origin still works normally in Firefox, which never adopted Manifest V3’s blocking restrictions, and in Chromium browsers that kept Manifest V2 support. If ad and tracker blocking is the reason you’re reading this guide, changing browsers is a bigger upgrade than any extension you can install.

Privacy Badger — EFF’s Tracker Blocklist

Developed by the Electronic Frontier Foundation (EFF), Privacy Badger identifies trackers by behaviour rather than by name: it watches which third-party domains follow users across multiple unrelated sites, and blocks the ones that do.

One detail is widely misreported, including in guides written years ago and never updated. Privacy Badger no longer does that learning on your own machine by default. EFF turned local learning off in 2020 after Google’s security team demonstrated that an ad network could deliberately feed a browser a pattern of domains, then read back which ones got blocked — using Privacy Badger’s own learning as a fingerprint to identify that specific user. Since then, Privacy Badger ships with a pre-trained blocklist that EFF generates centrally, and every install behaves identically. You can still opt into local learning in the settings, but you’re trading the protection it was disabled for.

In practice this makes Privacy Badger a well-curated blocklist rather than the adaptive tool it’s often described as. It still complements uBlock Origin — different lists, different heuristics — but if you’re only going to run one blocker, run uBlock Origin.

HTTPS-Only Mode — Don’t Install an Extension for This

Connecting to a website over unencrypted HTTP means anyone on your network can see exactly what you’re browsing. Plenty of older guides still tell you to install EFF’s HTTPS Everywhere to fix that. Don’t — EFF retired the extension in January 2023, because every major browser now does the job natively.

Chrome, Firefox, Edge, and Safari all ship an HTTPS-only setting, and the built-in versions are stricter than the extension ever was: instead of quietly upgrading what it could and letting the rest through, the browser refuses the insecure connection and shows you a warning you have to click past. Turn it on:

• Firefox — Settings → Privacy & Security → HTTPS-Only Mode → “Enable HTTPS-Only Mode in all windows”
• Chrome / Edge — Settings → Privacy and security → Security → “Always use secure connections”
• Safari — on by default; Safari upgrades to HTTPS automatically with no setting to change

This matters most on public Wi-Fi networks, where unencrypted traffic is trivial to intercept. If you want the full picture of what the padlock does and doesn’t tell you, see our guide on why HTTPS matters.

Cookie AutoDelete — Automatic Cookie Cleanup

Cookies are small files that websites store in your browser. While some are necessary for basic functionality like keeping you logged in, many exist solely to track your activity across the web. Third-party cookies — those set by domains other than the one you’re visiting — are the primary mechanism for cross-site tracking.

Cookie AutoDelete gives you granular control over cookies. It automatically deletes cookies from closed tabs while preserving cookies from sites you trust and use regularly. You can whitelist your favorite sites so their cookies persist, while all other cookies are cleaned up automatically.

This approach gives you the best of both worlds: convenience on sites you trust, and privacy everywhere else. Your cookie jar stays clean without requiring you to manually manage anything after the initial setup.

Decentraleyes / LocalCDN — Preventing CDN Tracking

Many websites load common libraries and fonts from centralized content delivery networks (CDNs) like Google Hosted Libraries or Cloudflare’s cdnjs. Every time your browser requests a file from these CDNs, they learn which websites you’re visiting and when.

Decentraleyes solves this by bundling commonly requested files locally in the extension. When a website asks for a file from a known CDN, the extension intercepts the request and serves the file from your local copy instead. The website works perfectly, but the CDN never learns about your visit.

Decentraleyes vs LocalCDN — install one, not both. LocalCDN is a fork of Decentraleyes that carries a substantially larger bundle of libraries and keeps up with newer versions of them, which means it actually intercepts more requests instead of letting them fall through to the CDN. Decentraleyes shipped a smaller, older set. For most people LocalCDN is the one to install. Running both at once is pointless and will cause them to fight over the same requests.

This is a subtle improvement most people overlook, and it works silently in the background. Worth noting: the trade-off runs the other way on rare occasions — a site that needs a library version the extension doesn’t carry may break until you pause it.

Advanced Privacy Extensions

Firefox Multi-Account Containers

Available only for Firefox, Multi-Account Containers is a powerful tool for isolating your online identities. It lets you separate your browsing into color-coded containers — one for work, one for personal use, one for shopping, one for social media, and so on. Cookies and site data from one container can’t access information from another.

This means that when you check Facebook in your social media container and then shop on Amazon in your shopping container, Facebook’s trackers can’t see your Amazon activity. Each container operates as its own isolated browsing environment, breaking the tracking chains that connect your activities across different websites.

For an even more specific solution, the Facebook Container extension automatically isolates Facebook and Instagram into their own container, preventing Meta’s extensive tracking network from following you around the web.

NoScript — Maximum Script Control

NoScript takes the most aggressive approach to browser privacy by blocking all JavaScript, Java, and Flash content by default. Since most tracking and advertising relies on JavaScript, this effectively eliminates nearly all tracking. You then selectively allow scripts on sites you trust.

This approach provides exceptional security and privacy but requires significant effort to configure. Many modern websites rely heavily on JavaScript, so you’ll spend time allowlisting scripts until your regularly visited sites work properly. NoScript is best suited for security-conscious users who are willing to trade convenience for maximum protection.

ClearURLs — Strip Tracking Parameters

When you click a link from social media, an email newsletter, or a search result, the URL often contains tracking parameters — those long strings of characters after the question mark. These parameters tell the destination site where you came from, which ad you clicked, and other identifying information.

ClearURLs automatically strips these tracking parameters from URLs before your browser follows them. The websites still load normally, but they receive less information about how you arrived and who you are. It’s a small but meaningful privacy improvement that works invisibly in the background.

Best Privacy Extensions by Browser

Which extensions you should install depends less on your threat model than it used to, and more on which browser you opened this page in. Manifest V3 split the landscape: the same extension name can mean two very different levels of protection depending on where it’s running.

Chrome

Chrome is the hardest browser to make private, and that is a design decision rather than an oversight — Google’s revenue comes from advertising, and Manifest V3 constrained exactly the class of extension that interferes with it.

A workable Chrome stack is uBlock Origin Lite, Cookie AutoDelete, and ClearURLs, with Chrome’s “Always use secure connections” turned on. Understand what you’re getting: a blocker Google set the ceiling for. If blocking quality is what you care about, the honest recommendation is to stop optimising Chrome and use a different browser for general browsing.

Firefox

Firefox has the best privacy extension support of any mainstream browser, largely because Mozilla kept supporting the blocking API that Chrome removed. The full uBlock Origin runs here exactly as designed.

A strong Firefox setup:

1. uBlock Origin — the complete version, not Lite
2. Cookie AutoDelete — automatic cookie cleanup
3. ClearURLs — strips tracking parameters
4. LocalCDN — blocks CDN-based tracking
5. Multi-Account Containers — isolates identities (Firefox-only, and genuinely useful)

Firefox also ships Enhanced Tracking Protection, which is on by default and worth switching from “Standard” to “Strict” in Settings → Privacy & Security. Strict occasionally breaks a site; the toggle to fix it is right there in the address bar.

Brave

Brave blocks ads and trackers by default through Brave Shields, so the baseline is already higher than an unconfigured Chrome or Firefox. For most people, Shields plus Brave’s built-in fingerprinting protection is enough, and adding a second ad blocker on top mostly creates conflicts.

Because Brave is Chromium-based it installs Chrome Web Store extensions, so ClearURLs, Cookie AutoDelete, and LocalCDN all work if you want them. Brave inherits Manifest V3’s limits on extensions, but that matters far less here, since the blocking that Manifest V3 restricts is handled by the browser itself rather than by an extension.

Safari

Safari’s extension ecosystem is small, and Apple uses a separate content-blocker API rather than the Chrome or Firefox model, so most extensions in this guide simply don’t exist for it. What Safari has instead is Intelligent Tracking Prevention, which is on by default and does a decent job of limiting cross-site cookies without any configuration.

If you want more, AdGuard for Safari is the most established third-party content blocker on the platform. Safari is a reasonable default on Mac and iPhone — just don’t expect to build the same stack you would in Firefox.

Edge

Edge is Chromium with Microsoft’s telemetry attached, so it inherits Chrome’s Manifest V3 situation exactly: no full uBlock Origin, uBlock Origin Lite available. Edge’s own Tracking Prevention has three levels and defaults to “Balanced”; set it to “Strict” in Settings → Privacy, search, and services. Otherwise, treat Edge’s extension options as identical to Chrome’s.

Setting Up Your Privacy Extension Stack

The best privacy setup depends on your needs and how much effort you want to invest. Here are three recommended configurations.

Basic Setup (Minimal Effort, Good Privacy)

For most people, installing just two extensions provides a dramatic privacy improvement:

1. uBlock Origin — blocks ads and known trackers (uBlock Origin Lite in Chrome and Edge)
2. Cookie AutoDelete — cleans up tracking cookies automatically

This combination blocks the vast majority of tracking while requiring almost zero configuration. Install both, set Cookie AutoDelete to auto-clean, and you’re done. Brave users can skip the blocker entirely — Shields already covers it.

Intermediate Setup (Moderate Effort, Strong Privacy)

Adding a few more extensions creates a more comprehensive privacy shield:

1. uBlock Origin — ad and tracker blocking (Lite in Chrome and Edge)
2. Privacy Badger — EFF’s curated tracker blocklist
3. Cookie AutoDelete — automatic cookie cleanup
4. ClearURLs — strip tracking from links
5. LocalCDN — prevent CDN tracking

This stack covers most tracking vectors and requires only occasional attention when a website doesn’t work correctly (usually resolved by pausing an extension temporarily).

Advanced Setup (More Effort, Maximum Privacy)

For users who prioritize privacy above all else:

1. All extensions from the intermediate setup
2. NoScript — full script control
3. Firefox Multi-Account Containers — identity isolation
4. Firefox as your primary browser (best extension support and privacy features)

This configuration requires more setup time and occasional troubleshooting but provides near-complete protection against web tracking.

Tips for Getting the Most From Privacy Extensions

Keep Extensions Updated

Privacy extensions are only effective when they have current information about trackers and threats. Most extensions update their filter lists automatically, but check occasionally to make sure auto-updates are enabled. An outdated tracker list is like having a security guard with a photo lineup from five years ago.

Don’t Install Too Many Extensions

While it’s tempting to install every privacy extension available, too many extensions can actually harm your privacy. Each extension has access to your browsing data, so every one you install is another piece of software you’re trusting. Additionally, a unique combination of many extensions can make your browser fingerprint more distinctive, paradoxically making you easier to track.

Stick to a curated set from a reputable source, and resist the urge to install every new privacy tool you discover. Quality and trustworthiness matter more than quantity.

Test After Installation

After installing privacy extensions, visit a few of your regularly used websites to make sure everything works correctly. Some sites may break because they rely on scripts or cookies that your new extensions block. When this happens, you can usually whitelist the specific site in the extension that’s causing the issue.

The EFF’s Cover Your Tracks tool (formerly Panopticlick) can show you how effectively your setup blocks tracking and how unique your browser fingerprint is. It’s a useful way to verify that your extensions are working as expected.

Use Private Browsing Mode Wisely

Private browsing mode (Incognito in Chrome, Private Window in Firefox) is useful but limited. It prevents your browser from saving your history and cookies locally, but it doesn’t hide your activity from websites, your ISP, or network administrators. Think of it as covering your tracks on your own device, not hiding from the internet.

For true privacy, combine private browsing with your privacy extensions and consider using a VPN to encrypt your internet connection and hide your activity from your ISP.

Mobile Browser Privacy

Privacy on mobile browsers is trickier since extension support is more limited. Firefox for Android supports most desktop extensions, making it the best choice for privacy-conscious mobile browsing. On iOS, Safari with its built-in content blockers and tracking prevention is a solid option.

For maximum mobile privacy, consider the Firefox Focus browser, which blocks trackers by default and automatically erases your browsing history when you close the app. Brave’s mobile browsers also include built-in ad and tracker blocking on both platforms.

Remember that mobile privacy extends beyond your browser. The apps on your phone often track you even more aggressively than websites, so reviewing your social media privacy settings and app permissions is just as important as securing your browser.

What Privacy Extensions Can’t Do

It’s important to understand the limitations of browser privacy extensions. They protect you from many common forms of tracking, but they’re not a complete privacy solution.

Privacy extensions can’t hide your IP address from websites — for that, you need a VPN. They can’t protect you from phishing attacks that trick you into voluntarily giving up your information. And they can’t undo privacy choices you’ve already made, like the data you’ve already shared with social media platforms.

Think of privacy extensions as one layer in a multi-layered privacy strategy. They work best when combined with careful browsing habits, strong account security, and awareness of the other ways your data can be collected and used.

Conclusion

Installing browser privacy extensions is one of the simplest and most effective steps you can take to protect your online privacy. Starting with uBlock Origin and building from there, you can dramatically reduce the amount of tracking you’re exposed to while browsing the web.

The one thing worth deciding first is the browser. Since Manifest V3, the gap between what a privacy extension can do in Firefox and what it can do in Chrome is wide enough that no amount of extension-picking closes it. Switching browsers takes ten minutes and does more than any install.

The key is to start somewhere — even a basic setup of one or two extensions provides significantly more privacy than default browser settings. As you become more comfortable, you can add additional layers of protection to match your privacy needs.

Combine your privacy extensions with strong password practices to secure your accounts, stay alert to phishing attempts that try to bypass your defenses, and consider using a VPN for comprehensive online privacy. Together, these tools create a strong foundation for a more private digital life.